diff --git a/ballerina-test/src/test/resources/grpc/expected-files/route_guide_pb.bal b/ballerina-test/src/test/resources/grpc/expected-files/route_guide_pb.bal
index 1bb714917c..6198c37791 100644
--- a/ballerina-test/src/test/resources/grpc/expected-files/route_guide_pb.bal
+++ b/ballerina-test/src/test/resources/grpc/expected-files/route_guide_pb.bal
@@ -82,8 +82,8 @@ public isolated client class RouteGuideClient {
     }
 }
 
-public client class RecordRouteStreamingClient {
-    private grpc:StreamingClient sClient;
+public isolated client class RecordRouteStreamingClient {
+    private final grpc:StreamingClient sClient;
 
     isolated function init(grpc:StreamingClient sClient) {
         self.sClient = sClient;
@@ -135,9 +135,9 @@ public class FeatureStream {
 
     public isolated function next() returns record {|Feature value;|}|grpc:Error? {
         var streamValue = self.anydataStream.next();
-        if (streamValue is ()) {
+        if streamValue is () {
             return streamValue;
-        } else if (streamValue is grpc:Error) {
+        } else if streamValue is grpc:Error {
             return streamValue;
         } else {
             record {|Feature value;|} nextRecord = {value: <Feature>streamValue.value};
@@ -150,8 +150,8 @@ public class FeatureStream {
     }
 }
 
-public client class RouteChatStreamingClient {
-    private grpc:StreamingClient sClient;
+public isolated client class RouteChatStreamingClient {
+    private final grpc:StreamingClient sClient;
 
     isolated function init(grpc:StreamingClient sClient) {
         self.sClient = sClient;
@@ -194,8 +194,8 @@ public client class RouteChatStreamingClient {
     }
 }
 
-public client class RouteGuideRouteSummaryCaller {
-    private grpc:Caller caller;
+public isolated client class RouteGuideRouteSummaryCaller {
+    private final grpc:Caller caller;
 
     public isolated function init(grpc:Caller caller) {
         self.caller = caller;
@@ -226,8 +226,8 @@ public client class RouteGuideRouteSummaryCaller {
     }
 }
 
-public client class RouteGuideRouteNoteCaller {
-    private grpc:Caller caller;
+public isolated client class RouteGuideRouteNoteCaller {
+    private final grpc:Caller caller;
 
     public isolated function init(grpc:Caller caller) {
         self.caller = caller;
@@ -258,8 +258,8 @@ public client class RouteGuideRouteNoteCaller {
     }
 }
 
-public client class RouteGuideFeatureCaller {
-    private grpc:Caller caller;
+public isolated client class RouteGuideFeatureCaller {
+    private final grpc:Caller caller;
 
     public isolated function init(grpc:Caller caller) {
         self.caller = caller;
diff --git a/gradle.properties b/gradle.properties
index 56cc074d1e..55b489af90 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -60,7 +60,7 @@ stdlibYamlVersion=0.5.3
 stdlibHttpVersion=2.11.1
 
 # Stdlib Level 06
-stdlibGrpcVersion=1.11.0
+stdlibGrpcVersion=1.11.1
 stdlibSoapVersion=1.0.0
 stdlibTransactionVersion=1.9.0
 stdlibWebsocketVersion=2.11.0
@@ -85,7 +85,7 @@ docUiApi=https://api.dev-central.ballerina.io/2.0/docs/doc-ui
 graphqlToolVersion=0.10.0
 
 # Protoc Tool
-protocToolVersion=0.2.0
+protocToolVersion=0.3.0
 
 # OpenAPI Module
 openapiToolVersion=2.0.0